CN113416587B - Oxidation regeneration tower of natural gas desulfurization system - Google Patents
Oxidation regeneration tower of natural gas desulfurization system Download PDFInfo
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- CN113416587B CN113416587B CN202110740949.5A CN202110740949A CN113416587B CN 113416587 B CN113416587 B CN 113416587B CN 202110740949 A CN202110740949 A CN 202110740949A CN 113416587 B CN113416587 B CN 113416587B
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- tower
- regeneration
- inner cylinder
- tower body
- sulfur
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- 230000008929 regeneration Effects 0.000 title claims abstract description 101
- 238000011069 regeneration method Methods 0.000 title claims abstract description 101
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 30
- 230000023556 desulfurization Effects 0.000 title claims abstract description 30
- 239000003345 natural gas Substances 0.000 title claims abstract description 22
- 230000003647 oxidation Effects 0.000 title claims abstract description 21
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000011593 sulfur Substances 0.000 claims abstract description 95
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 95
- 239000007788 liquid Substances 0.000 claims abstract description 89
- 239000006260 foam Substances 0.000 claims abstract description 72
- 239000007789 gas Substances 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 24
- 238000005273 aeration Methods 0.000 claims abstract description 20
- 239000002608 ionic liquid Substances 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 abstract description 9
- 239000010865 sewage Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009279 wet oxidation reaction Methods 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
Abstract
The invention relates to an oxidation regeneration tower of a natural gas desulfurization system, which comprises a tower body and an inner cylinder arranged in the tower body, wherein the bottom of the inner cylinder is connected to the inner wall of the tower body, the top end opening of the inner cylinder is positioned at the upper part of the tower body, the top of the inner cylinder is provided with an upper foam remover, and the inner cylinder divides the inner space of the regeneration tower into an outer regeneration zone positioned between the tower body and the inner cylinder, a lean liquid zone positioned in the inner cylinder and a mixed foam zone positioned above the upper foam remover; the regeneration tower comprises a rich liquid inlet, an aeration port, a sewage outlet, an inner air pipe, a lean liquid outlet, a sulfur foam overflow port and a regenerated gas outlet; the invention realizes the oxidation regeneration and the increase of the sulfur sedimentation time in the same tower kettle, effectively improves the regeneration effect, effectively solves the problem of incomplete regeneration, effectively improves the sedimentation separation of sulfur foam and sulfur particles, solves the possibility that the sulfur particles are likely to gather and block tower internals, and avoids the problem of equipment and pipeline sulfur blockage caused by the operation of sulfur in the whole circulating system.
Description
Technical Field
The invention belongs to the technical field of natural gas desulfurization, and particularly relates to an oxidation regeneration tower of a natural gas desulfurization system.
Background
Natural gas is a high energy, pollution-free fossil energy source, but natural gas produced from formations contains mostly hydrogen sulfide. Hydrogen sulfide is extremely toxic and highly corrosive, can corrode pipelines and devices, and is harmful to the environment and human health, so that natural gas desulfurization treatment is necessary.
At present H is removed 2 The method of S mainly comprises dry desulfurization and wet oxidation desulfurization. Dry desulfurization is mostly used for small-scale high-precision desulfurization due to the problem of limited sulfur capacity and recycling; the wet oxidation desulfurization has the advantages that the hydrogen sulfide in the gas can be directly converted into sulfur, but the problems of huge equipment volume, long process flow, large equipment investment, large solution circulation amount, easy blockage and entrainment and the like exist. Chinese patent CN209456395U discloses a natural gas desulfurization process device, wherein a regeneration tower is used, a regeneration tower annular groove and a regeneration tower distributor are sequentially arranged in the regeneration tower from top to bottom, a regeneration tower central mixing pipe is connected with the regeneration tower distributor, a regeneration tower annular groove liquid inlet pipeline, a regeneration tower annular groove liquid outlet pipeline, a regeneration tower liquid level regulating pipeline and a regeneration tower bottom liquid outlet pipeline are arranged on the regeneration tower, the regeneration tower liquid level regulating pipeline is connected with a lean solution tank, the regeneration tower annular groove liquid outlet pipeline is connected with a sulfur foam tank, and a liquid level regulator is arranged on the regeneration tower liquid level regulating pipeline; however, in the same way as in a general regeneration tower, the air and the rich desulfurization solution are oxidized and regenerated into lean solution after only one contact, so that the phenomena of short contact time between the rich solution and oxygen, uneven oxygen bubbling, incomplete regeneration and the like exist, and the desulfurization effect of the whole desulfurization system is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the natural gas desulfurization system oxidation regeneration tower which completes oxidation regeneration and increases sulfur sedimentation time in the same tower kettle.
The technical scheme of the invention is as follows:
the oxidation regeneration tower of the natural gas desulfurization system comprises a tower body and an inner cylinder arranged in the tower body, wherein the bottom of the inner cylinder is connected to the inner wall of the tower body, an opening at the top end of the inner cylinder is positioned at the upper part of the tower body, an upper foam remover is arranged at the top of the inner cylinder, and the inner cylinder divides the inner space of the regeneration tower into an outer regeneration area positioned between the tower body and the inner cylinder, a lean liquid area positioned in the inner cylinder and a mixed foam area positioned above the upper foam remover;
the regeneration tower comprises a rich liquid inlet, an aeration port and a drain outlet, wherein the rich liquid inlet is communicated with the outer regeneration zone, the aeration port is positioned at the bottom of the outer regeneration zone, the aeration port is positioned at the lower part of the outer regeneration zone and is connected with an inner air pipe for dispersing air flow, and the rich liquid inlet is positioned below the aeration port; the regeneration tower comprises a lean solution outlet communicated with the middle part of the lean solution zone, and the regeneration tower comprises a sulfur foam overflow port communicated with the middle and lower parts of the mixed foam zone and a regenerated gas outlet positioned at the top end of the mixed foam zone.
Further, the inner diameter of the inner cylinder is 16% -21% of the diameter of the inner wall of the tower body.
Further, the sulfur foam overflow port is positioned below the top end opening of the inner cylinder.
Further, a lower demister is arranged at the middle lower part of the inner cylinder corresponding to the lean solution outlet, and a sulfur particle outlet communicated with the bottom of the lean solution zone is arranged at the bottom of the tower body; the regeneration tower also comprises a sulfur-containing liquid outlet communicated with the bottom of the mixed foam area.
Further, the inner cylinder comprises an upper cylinder, a lower cylinder and a connecting cylinder fixedly arranged at the center of the lower part of the tower body, wherein the upper cylinder, the lower cylinder and the connecting cylinder are connected through flanges, a plurality of supporting rods are respectively arranged on the periphery of the upper parts of the upper cylinder and the lower cylinder, and the other ends of the supporting rods are fixed on the inner wall of the tower body, so that the inner cylinder is reinforced and supported by the supporting rods.
Further, the regeneration tower also comprises a lean solution reflux port and an ionic liquid inlet which are arranged in the middle of the tower body and are communicated with the outer regeneration zone, the lean solution reflux port is positioned above the ionic liquid inlet, and the tail end of the pipe body of which the lean solution reflux port and the ionic liquid inlet extend into the outer regeneration zone is provided with a downward elbow part.
Further, the regeneration tower also comprises a thermometer port arranged outside the tower body, an upper liquid level meter port positioned at the upper part of the tower body and a lower liquid level meter port positioned at the lower part of the tower body.
Further, rib plates are arranged on the periphery of the interface tube, which is positioned outside the tower body, of the thermometer opening, the upper liquid level meter opening and the lower liquid level meter opening, and the two rib plates are respectively arranged on two sides of the lower side of the interface tube.
Further, a manhole is further arranged on one side of the middle lower portion of the tower body, and an overhaul port opposite to the manhole is arranged on the tower body.
Further, the tower body is wrapped with an insulating layer.
The invention has the working process that the rich desulfurization liquid enters the regeneration tower from the rich liquid inlet, and is oxidized and regenerated with the regenerated gas entering from the aeration port to generate lean liquid and sulfur, the generated sulfur foam floats upwards along with the regenerated gas, and the generated sulfur particles suspend and aggregate and then settle to the bottom of the tower, and are discharged to a sulfur slurry pump through a sulfur particle discharge port and a sewage discharge port; the sulfur foam is discharged from the sulfur foam overflow port and enters a sulfur forming system; the barren liquor enters the inner barrel for sedimentation and is discharged from the barren liquor outlet; the excessive lean solution returns to the regeneration tower through a lean solution reflux port, and excessive regenerated gas is discharged to a tail gas system through a regenerated gas outlet; when the sulfur particles are more, the sulfur particles can be discharged to a sulfur forming system through a sulfur-containing liquid outlet.
Compared with the prior art, the invention has the beneficial effects that:
the invention realizes the completion of oxidation regeneration and the increase of sulfur sedimentation time in the same tower kettle, effectively improves the regeneration effect and effectively solves the problem of incomplete regeneration; the upper foam remover is arranged to effectively prevent the sulfur foam from entering the inner barrel, so that the aggregation of the sulfur foam is improved, the outward discharge of the sulfur foam is facilitated, and the upper foam remover effectively improves the sedimentation separation of the sulfur foam and the sulfur particles; the bottom of the inner cylinder and the bottom of the outer cylinder are provided with a sulfur particle outlet and a sewage outlet, thereby solving the possibility that sulfur particles can gather and block tower internals and avoiding the problem that equipment and pipelines are blocked due to the operation of sulfur in the whole circulating system.
Drawings
Fig. 1 is a simplified schematic structure of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic top view of an embodiment of the present invention.
In the figure, a rich liquid inlet 1, a lean liquid outlet 2, a lean liquid return port 3, a sulfur foam overflow port 4, an upper liquid level meter port 51, a lower liquid level meter port 52, a regenerated gas outlet 6, a sulfur-containing liquid outlet 7, a thermometer port 8, an aeration port 9, a sulfur particle discharge port 10, a sewage outlet 11, an inner cylinder 12, an inner air pipe 13, a lower foam remover 14, an upper foam remover 15, an ionic liquid inlet 16, a manhole 17, a support rod 18, an auxiliary sleeve 19 and a base 20.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 3, an oxidation regeneration tower of a natural gas desulfurization system comprises a tower body and an inner cylinder 12 arranged in the tower body, wherein the bottom of the inner cylinder 12 is connected to the inner wall of the tower body, the top end opening of the inner cylinder 12 is positioned at the upper part of the tower body, the top of the inner cylinder 12 is provided with an upper foam remover 15, and the inner cylinder 12 divides the inner space of the regeneration tower into an outer regeneration zone positioned between the tower body and the inner cylinder 12, a lean liquid zone positioned in the inner cylinder 12 and a mixed foam zone positioned above the upper foam remover 15;
the regeneration tower comprises a rich liquid inlet 1 communicated with the outer regeneration zone, an aeration port 9 and a drain outlet 11 positioned at the bottom of the outer regeneration zone, wherein the aeration port 9 is positioned at the lower part of the outer regeneration zone and is connected with an inner air pipe 13 for dispersing air flow, the inner air pipe 13 is communicated through a main pipe and is integrally arranged into concentric rings in the tower body, and the inner air pipe 13 at least comprises three rings of an inner ring pipe, an intermediate ring pipe and an outer ring pipe, so that the introduced regenerated gas can fully react with the introduced rich liquid; the rich liquid inlet 1 is positioned below the aeration port 9; the regeneration tower comprises a lean solution outlet 2 communicated with the middle part of the lean solution zone and a sulfur particle outlet 10 communicated with the bottom of the lean solution zone, and comprises a sulfur-containing liquid outlet 7 communicated with the bottom of the mixed foam zone, a sulfur foam overflow port 4 communicated with the middle lower part of the mixed foam zone and a regenerated gas outlet 6 positioned at the top end of the mixed foam zone; the sulfur-containing liquid outlet 7 is positioned below the sulfur foam overflow port 4; the rich liquid inlets 1 may be provided in two spaced apart arrangement;
the rich liquid and the regenerated gas are subjected to aeration regeneration in an external regeneration zone, lean liquid, sulfur foam and a small amount of sulfur particles are generated by oxidation, the lean liquid, the sulfur foam and a small amount of sulfur particles are upwards generated by virtue of self buoyancy and the regenerated gas flow, the sulfur foam is blocked by an upper foam remover 15 and cannot enter the inner cylinder 12, the sulfur foam is gathered in a mixed foam zone, the generated lean liquid and part of the sulfur particles enter the inner cylinder 12, the sulfur particles in the inner cylinder 12 can be settled to the bottom of the inner cylinder 12 due to no influence of upward gas flow, and the clarified lean liquid is discharged from the middle part of the inner cylinder;
the regeneration tower adopts an inner barrel and outer barrel structure, thereby realizing the completion of oxidation regeneration and the increase of sulfur sedimentation time in the same tower kettle; the rich liquid and the regenerated gas fully react in the external regeneration zone, and clear lean liquid is extracted from the lower half part of the inner cylinder 12, so that the regeneration effect is effectively improved, and the problem of incomplete regeneration is effectively solved; the upper foam remover 15 effectively prevents the sulfur foam from entering the inner barrel 12, improves the aggregation of the sulfur foam and is beneficial to the discharge of the sulfur foam, and the upper foam remover 15 effectively improves the sedimentation separation of the sulfur foam and the sulfur particles; the bottom of the inner cylinder and the outer cylinder is provided with the sulfur particle outlet 10 and the sewage outlet 11, thereby solving the possibility that sulfur particles can gather and block tower internals and avoiding the problem of equipment and pipeline sulfur blockage caused by the operation of sulfur in the whole circulating system.
Further, as shown in fig. 1 to 3, the inner diameter of the inner cylinder 12 is 16% -21% of the diameter of the inner wall of the tower body, and the suitable inner diameter ratio balances the volumes of the outer regeneration zone and the lean liquid zone.
Further, as shown in fig. 1 to 3, the sulfur foam overflow port 4 is located below the top opening of the inner cylinder 12, where the sulfur foam in the lower part belongs to the lower part of the mixed foam area, and the sulfur foam in the lower part is denser, and because the inner cylinder 12 occupies a space, the sulfur foam has a converging effect, and the fluidity is stronger because the sulfur foam is adhered to the surface of the liquid, after the sulfur foam at the foam overflow port is discharged, surrounding sulfur foam can timely supplement the space, and the effective discharge of the sulfur foam is maintained.
Further, as shown in fig. 1 to 2, a lower demister 14 is disposed at the middle lower portion of the inner cylinder 12 corresponding to the lean liquid outlet 2; specifically, the connection through hole of the lean liquid outlet 2 on the inner tube 12 is located on the peripheral side of the lower demister 14; the upper demister 15 and the lower demister 14 can be silk screen demisters in the prior art, and are installed in the inner cylinder 12 in a shaped manner through a grille.
Further, as shown in fig. 2 to 3, in order to increase the flow rate of the lean solution outlet 2, an auxiliary sleeve 19 is provided at the junction between the outside of the inner cylinder 12 and the pipe into which the lean solution outlet 2 extends, the auxiliary sleeve 19 is sleeved outside the inner cylinder 12, a separation hole is provided on the wall of the inner cylinder 12 covered by the auxiliary sleeve 19, and the lean solution filtered by the lower demister 14 flows out of the lean solution outlet 2 from the separation hole through the auxiliary sleeve 19, respectively.
Further, as shown in fig. 1 to 3, the inner cylinder 12 includes an upper cylinder, a lower cylinder and a connecting cylinder fixedly arranged in the center of the lower part of the tower body, the upper cylinder, the lower cylinder and the connecting cylinder are all in flange connection, the peripheries of the upper parts of the upper cylinder and the lower cylinder are respectively provided with a plurality of struts 18, and the other ends of the struts 18 are fixed on the inner wall of the tower body so that the inner cylinder 12 is reinforced and supported by the struts 18; the upper demister 15 is positioned at the upper part of the upper cylinder, the lower demister 14 is positioned at the upper part of the lower cylinder, and the inner cylinder 12 in flange connection is convenient for the installation of the upper demister 15 and the lower demister 14 and the maintenance of the inner cylinder 12.
Further, as shown in fig. 2 to 3, the regeneration tower further comprises a lean solution return port 3 and an ionic liquid inlet 16, which are arranged in the middle of the tower body and are communicated with the outer regeneration zone, wherein the lean solution return port 3 is positioned above the ionic liquid inlet 16, and the tail ends of the pipe bodies of the lean solution return port 3 and the ionic liquid inlet 16 extending into the outer regeneration zone are provided with downward elbow parts; the tail end of the pipe body of the rich liquid inlet 1 extending into the external regeneration zone is also provided with a downward elbow part, and the elbow part prolongs the path of liquid entering the tower body and prolongs the residence time in the tower body; the natural gas desulfurization system is the same as a common regeneration tower in use, the sulfur foam overflow port 4 flows out and then enters a centrifugal machine, the sulfur is dehydrated and separated into sulfur and dehydrated water under the action of the centrifugal machine, the sulfur is collected and stored in a sulfur storage device, and the dehydrated water returns to an external regeneration zone through the ionic liquid inlet 16.
Further, as shown in fig. 1 to 3, the regeneration tower further comprises a thermometer port 8 arranged outside the tower body, an upper liquid level meter port 51 positioned at the upper part of the tower body and a lower liquid level meter port 52 positioned at the lower part of the tower body; the thermometer ports 8 are positioned in the middle of the tower body and above the aeration ports 9, and the number of the thermometer ports 8 is at least two and is uniformly arranged; when the invention is used, the regenerated gas entering from the aeration port 9 is hot air, the temperature of the hot air is about 80 ℃, the hot air is neutralized with the introduced rich liquid at the common temperature, a temperature transmitter is arranged in the thermometer port 8, the regeneration temperature of the reaction of the rich liquid and the regenerated gas is monitored in real time, and the regeneration temperature is controlled to be 50 ℃ by controlling the temperature of the regenerated gas during regeneration;
the upper liquid level meter port 51 is positioned above the upper foam remover 15 and higher than the position of the sulphur foam overflow port 4, the lower liquid level meter port 52 is positioned below the aeration port 9, and liquid level sensors are arranged in the upper liquid level meter port 51 and the lower liquid level meter port 52 and are used for monitoring the gear of the liquid level in the regeneration tower; in order to increase the installation stability of the liquid level sensor, a liquid level installation seat corresponding to the upper liquid level meter port 51 and the lower liquid level meter port 52 is arranged on the outer wall of the inner barrel 12, and the extending end of the liquid level sensor can be fixed on the liquid level installation seat, so that the double-point fixing of the liquid level sensor is realized, and the fixing is firmer.
Further, as shown in fig. 2, rib plates are arranged at the periphery of the interface tube, which is positioned outside the tower body, of the thermometer port 8, the upper liquid level meter port 51 and the lower liquid level meter port 52, and the two rib plates are respectively arranged at two sides of the lower side of the interface tube.
Further, as shown in fig. 2 to 3, a manhole 17 is further provided at one side of the lower middle part of the tower body, and an access hole opposite to the manhole 17 is provided on the tower body.
Further, as shown in fig. 2, the regeneration tower further comprises a base 20 disposed at the bottom of the tower body, and the drain 11 and the sulfur granule discharge outlet 10 are discharged to the outside of the peripheral wall of the base 20 through pipelines; in one embodiment, the total volume of the regeneration tower is about 20 cubic meters, a heat preservation layer with the thickness of 60mm is wrapped outside the tower body, the heat preservation material is centrifugal glass wool, the overall height of the regeneration tower with the base 20 is about 6000mmm, the nominal diameter of the regenerated gas outlet 6, the sulfur foam overflow port 4, the sulfur-containing liquid outlet 7, the rich liquid inlet 1 and the ion liquid inlet 16 is 100mm, the nominal diameter of the aeration port 9 is 80mm, the nominal diameter of the lean liquid reflux port 3 is 50mm, and the nominal diameters of the sewage discharge port 11, the upper liquid level meter port 51, the lower liquid level meter port 52 and the thermometer port 8 are 25mm; the nominal diameter of the manhole 17 and the inspection hole is more than 450 mm;
in fig. 3, the thermometer port 8 located directly below the lean solution return port 3, the drain port 11 located directly below the left rich solution inlet 1, and the ionic liquid inlet 16 located directly below the sulfur-containing liquid outlet 7 are not shown in fig. 3 due to the influence of the top view.
When the invention is used, the rich desulfurization liquid enters the regeneration tower from the rich liquid inlet 1, and is oxidized and regenerated with the regenerated gas entering from the aeration port 9 to generate lean liquid and sulfur, the generated sulfur foam floats upwards along with the regenerated gas, and the generated sulfur particles suspend and aggregate and then settle to the bottom of the tower, and are discharged to a sulfur slurry pump through the sulfur particle discharge port 10 and the sewage discharge port 11; the sulfur foam is discharged from the sulfur foam overflow port 4 and enters a sulfur forming system; the barren liquor enters the inner barrel 12 for sedimentation and is discharged from the barren liquor outlet 2; the excessive lean solution is returned to the regeneration tower through a lean solution return port 3, and excessive regenerated gas is discharged to a tail gas system through a regenerated gas outlet 6; when the sulfur particles are more, the sulfur particles can be discharged to a sulfur forming system through the sulfur-containing liquid outlet 7.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (9)
1. An oxidation regeneration tower of a natural gas desulfurization system is characterized in that: the tower comprises a tower body and an inner cylinder arranged in the tower body, wherein the bottom of the inner cylinder is connected to the inner wall of the tower body, the top end opening of the inner cylinder is positioned at the upper part of the tower body, the top of the inner cylinder is provided with an upper foam remover, and the inner cylinder divides the inner space of the regeneration tower into an outer regeneration zone positioned between the tower body and the inner cylinder, a lean liquid zone positioned in the inner cylinder and a mixed foam zone positioned above the upper foam remover;
the regeneration tower comprises a rich liquid inlet, an aeration port and a drain outlet, wherein the rich liquid inlet is communicated with the outer regeneration zone, the aeration port is positioned at the bottom of the outer regeneration zone, the aeration port is positioned at the lower part of the outer regeneration zone and is connected with an inner air pipe for dispersing air flow, and the rich liquid inlet is positioned below the aeration port; the regeneration tower comprises a lean solution outlet communicated with the middle part of the lean solution zone, the regeneration tower comprises a sulfur foam overflow port communicated with the middle lower part of the mixed foam zone and a regenerated gas outlet positioned at the top end of the mixed foam zone, a lower foam remover is arranged at the middle lower part of the inner cylinder corresponding to the lean solution outlet, and a sulfur particle outlet communicated with the bottom of the lean solution zone is arranged at the bottom of the tower body; the regeneration tower also comprises a sulfur-containing liquid outlet communicated with the bottom of the mixed foam zone.
2. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: the inner diameter of the inner cylinder is 16% -21% of the diameter of the inner wall of the tower body.
3. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: the sulfur foam overflow port is positioned below the top end opening of the inner cylinder.
4. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: the inner cylinder comprises an upper cylinder, a lower cylinder and a connecting cylinder fixedly arranged at the center of the lower part of the tower body, wherein the upper cylinder, the lower cylinder and the connecting cylinder are connected through flanges, a plurality of supporting rods are respectively arranged on the periphery of the upper parts of the upper cylinder and the lower cylinder, and the other ends of the supporting rods are fixed on the inner wall of the tower body, so that the inner cylinder is reinforced and supported by the supporting rods.
5. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: the regeneration tower also comprises a lean solution reflux port and an ionic liquid inlet which are arranged in the middle of the tower body and communicated with the outer regeneration zone, wherein the lean solution reflux port is positioned above the ionic liquid inlet, and the tail end of the pipe body of which the lean solution reflux port and the ionic liquid inlet extend into the outer regeneration zone is provided with a downward elbow part.
6. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: the regeneration tower also comprises a thermometer port arranged outside the tower body, an upper liquid level meter port positioned at the upper part of the tower body and a lower liquid level meter port positioned at the lower part of the tower body.
7. The natural gas desulfurization system oxidation regeneration tower according to claim 6, characterized in that: the outer periphery of the interface tube, which is positioned outside the tower body, of the thermometer opening, the upper liquid level meter opening and the lower liquid level meter opening is provided with two rib plates which are respectively arranged on two sides of the lower side of the interface tube.
8. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: one side of the lower part in the tower body is also provided with a manhole, and the tower body is provided with an overhaul port opposite to the manhole.
9. The natural gas desulfurization system oxidation regeneration tower according to claim 1, characterized in that: and an insulating layer is wrapped outside the tower body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110740949.5A CN113416587B (en) | 2021-06-30 | 2021-06-30 | Oxidation regeneration tower of natural gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| JPH11276841A (en) * | 1998-03-31 | 1999-10-12 | Nippon Steel Chem Co Ltd | Device for submerged regeneration in wet desulfurizing |
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